Actually, Cheri, these plantsActually, Cheri, these plants may not be very healthy. It sounds like they have fallen victim to root disease and/or insect damage (such as by squash bugs)...and there's not much you can do. It also could have been caused by excess moisture or excess nitrogen. If this were a vegetable garden, we'd recommend rotating your crops but this is an accident—or a gift! For now, enjoy it while it lasts. Try again next year, on purpose, in a prepared garden bed.